
Superhero Captain America battles the evil forces of the archvillain called The Scarab, who poisons his enemies and steals a secret device capable of destroying buildings by sound vibrations.
Dick PurcellCaptain America / Grant Gardner
Lorna GrayGail Richards
Lionel AtwillCyrus Maldor
Charles TrowbridgePolice Commissioner Dryden
Russell HicksMayor Randolph
George J. LewisBart Matson
John DavidsonGruber
Frank ReicherLyman
Al FergusonDetective
Howard HickmanLyman’s Attorney
Tom LondonMack
Edward Van SloanGregoryJames CarlisleJ.V. Wilson (uncredited)